Sludge cleaning device for reorganized and expanded circular pipe culvert of expressway

Abstract

The invention relates to the technical field of circular pipe culvert sludge cleaning, and discloses an expressway reconstruction and extension circular pipe culvert sludge cleaning device. A sludge cleaning disc assembly is installed at the front end of a sludge cleaning vehicle body, and a middle high-pressure water spraying auger assembly is rotationally arranged in the middle of the sludge cleaning vehicle body; the front end of the middle high-pressure water spraying auger assembly penetrates and extends out of the middle of the desilting disc assembly. The front end cutter head of the dredging disc assembly and the gathering and conveying assembly cooperate to complete sludge stirring and loosening and impurity gathering, and sludge blockage is avoided; impurity conveying and auxiliary desilting are achieved through a hollow rotating cylinder and a high-pressure water spraying structure of the middle high-pressure water spraying auger assembly, finally impurity collection and solid-liquid separation are completed through a filtering and collecting basket, sludge impurities are effectively prevented from being accumulated in the round pipe culvert, and rapid sludge accumulation caused by the sludge impurities is avoided. An efficient and coherent desilting operation closed loop is formed, and the problems that the highway circular pipe culvert is low in desilting efficiency, not thorough in desilting, difficult in impurity treatment and the like are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of sludge removal technology for circular culverts, specifically a sludge removal device for circular culverts used in highway reconstruction and expansion projects. Background Technology

[0002] As a crucial component of the drainage system, highway culverts play a vital role in removing surface water and preventing flood damage. Excessive silt buildup within these culverts severely impacts drainage capacity, leading to road flooding, increased traffic accident risks, and potentially damaging the roadbed, thus shortening the highway's lifespan. When silt blockage is severe, traditional mechanical dredging methods are ineffective at loosening the silt, resulting in low efficiency and high costs. Traditional high-pressure water jet dredging methods often leave impurities like stones mixed in with the silt inside the culvert, making thorough cleaning difficult and causing rapid silt accumulation and blockage. Therefore, we have developed a silt removal device for highway culverts during reconstruction and expansion. Summary of the Invention

[0003] The purpose of this invention is to provide a sludge removal device for circular culverts during highway reconstruction and expansion, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a sludge cleaning device for circular culverts in highway reconstruction and expansion, comprising a sludge cleaning vehicle body, a sludge cleaning disc assembly installed at the front end of the sludge cleaning vehicle body, and a central high-pressure water jet auger assembly rotatably arranged in the middle of the sludge cleaning vehicle body, the front end of the central high-pressure water jet auger assembly extending through the middle of the sludge cleaning disc assembly. The sludge removal disc assembly includes a central fixed pipe, a front cutter disc sleeved on the outer side of the front of the central fixed pipe, a gathering and conveying assembly evenly spaced at the front of the front cutter disc, a driving assembly located at the rear of the front cutter disc, and a fixed external toothed ring installed on the outer side of the front of the central fixed pipe. The front-end cutter head is driven to rotate by the first servo motor at the upper front of the dredging vehicle body to agitate the sludge. At the same time, the front-end cutter head drives the gathering and conveying component through the fixed external toothed ring and the drive component, so that the gathering and conveying component gathers the impurities in the sludge in the center. The central high-pressure water jet auger assembly includes a hollow rotating drum installed in the middle channel of the dredging vehicle body, spiral blades installed on the outer wall of the front part of the hollow rotating drum, and a water inlet assembly connected to the rear end of the hollow rotating drum. The hollow rotary drum is driven to rotate by a second servo motor at the upper rear of the dredging vehicle, which transports the collected sludge and impurities backward.

[0005] Preferably, a protective cover is provided at the upper rear end of the dredging vehicle body, covering the outside of the second servo motor; The outer rear end of the hollow rotating drum is fixed with a first pulley, which is connected to the second pulley at the output end of the second servo motor via a belt.

[0006] Preferably, a number of bearings are embedded in the rear part of the intermediate channel, and the bearings are sleeved on the outer rear part of the hollow rotating cylinder.

[0007] Preferably, the front end of the hollow rotating cylinder is provided with a conical sealing head, and the surface of the conical sealing head is provided with several sets of water spray holes; The water inlet assembly includes a fixed base fixed at the rear end of the intermediate channel, a plug pipe disposed at the middle of the front end of the fixed base, and a water inlet hose connected at the middle of the rear end of the fixed base. The insertion tube is inserted into the middle of the rear end of the hollow rotating cylinder.

[0008] Preferably, a filter collection basket is inserted into the receiving slot at the rear of the dredging vehicle body, the bottom of the filter collection basket is provided with a filter slot, and a leakage slot is provided in the middle of the middle channel, which is connected to the top of the front end of the receiving slot.

[0009] Preferably, the front cutter head has a central reserved hole for inserting the front end of the central fixed tube, and the front end of the front cutter head has a number of sets of front inner grooves at equal intervals, and the rear end of the front cutter head has a number of sets of rear inner grooves at equal intervals. The gathering and conveying assembly includes an inner pulley fixed to the inner side of the front inner groove by an inner shaft, an outer pulley fixed to the outer side of the front inner groove by an outer shaft, a conveyor belt connecting the inner and outer pulleys, and scrapers evenly spaced on the outer side of the conveyor belt. The drive assembly includes a first spiral bevel gear with one end of its inner shaft extending into a corresponding rear inner groove and then fixed thereafter, a second spiral bevel gear meshing with the first spiral bevel gear, and a planetary gear whose middle part is fixed by a rotating shaft. The planetary gear meshes with the outside of the fixed external gear ring.

[0010] Preferably, a first annular end cap is fixed to the rear end of the front cutter head. The first annular end cap is sleeved on the outer side of the front end of the middle fixing tube, sealing the first spiral bevel gear and the second spiral bevel gear in the corresponding rear inner groove. The front end of the first annular end cap is fixed with several sets of limiting cylinders at equal intervals, and the rear end of the first annular end cap is also provided with an annular cylinder seat. The rotating shaft extends into the annular cylinder seat through the corresponding limiting cylinder and is then fixedly connected to the planetary gear.

[0011] Preferably, a second annular end cap is fixed to the rear end of the annular cylindrical seat. The second annular end cap is sleeved on the outer rear part of the middle fixing tube, sealing the fixing external gear ring and planetary gear inside the annular cylindrical seat.

[0012] Preferably, a protective cylinder seat is fixed to the rear end of the second annular end cap, and a drive gear ring is provided on the outer side of the rear end of the protective cylinder seat; The upper front part of the dredging vehicle is provided with a protective shell for protecting the first servo motor. The output end of the first servo motor is connected to a drive gear, which meshes with the top outer side of the drive gear ring. The protective cylinder seat is also provided with a fixed internal threaded disc that is screwed to the outer side of the rear part of the middle fixed tube; The front outer side of the intermediate channel is fixed with a mounting ring by several sets of equally spaced connecting blocks, and the mounting ring is fixed to the rear end of the fixed internal threaded disc.

[0013] Preferably, the rear end of the central fixing tube is inserted into the front side of the interior of the central channel, and the front end of the hollow rotating cylinder extends through the central fixing tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The front-end cutter head of the sludge removal disc assembly of this invention works in conjunction with the gathering and conveying assembly to complete the mixing and loosening of sludge and the agglomeration of impurities, thus avoiding sludge blockage; the hollow rotating cylinder and high-pressure water jet structure of the middle high-pressure water jet auger assembly realize the conveying of impurities and assist in sludge removal; finally, the impurities are collected and solid-liquid separation is completed through the filter collection basket, which effectively prevents sludge and impurities from accumulating in the circular pipe culvert and avoids the rapid accumulation of sludge caused by sludge and impurities. The components are connected by gear transmission, belt transmission, and pipeline connection to achieve precise power transmission, forming an efficient and continuous closed loop for dredging operations. This effectively solves problems such as low efficiency in cleaning silt from highway culverts, incomplete dredging, and difficulty in handling impurities. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 For the present invention Figure 1 A schematic diagram of the three-dimensional structure from another perspective; Figure 3 For the present invention Figure 2 A schematic diagram of the three-dimensional structure from another perspective; Figure 4 This is an exploded structural diagram of the assembly of the sludge removal disc assembly and the sludge removal vehicle body of the present invention; Figure 5 This is a three-dimensional structural diagram of the sludge removal disc assembly of the present invention; Figure 6 This is an exploded structural diagram of the sludge removal disc assembly of the present invention; Figure 7 This is a schematic diagram of the connection between the first spiral bevel gear and the second spiral bevel gear of the present invention; Figure 8This is a schematic diagram of the structure of the outer and inner pulleys of the present invention; Figure 9 For the present invention Figure 6 A schematic diagram of the three-dimensional structure from another perspective; Figure 10 This is a schematic diagram of the assembly of the conveying component and the front-end cutter head of the present invention; Figure 11 This is a schematic diagram of the connection between the planetary gear and the fixed external gear ring of the present invention; Figure 12 This is a schematic diagram of the installation structure of the second servo motor and the first servo motor of the present invention; Figure 13 This is a three-dimensional structural diagram of the assembled high-pressure water jet auger assembly and dredging vehicle body of the present invention. Figure 14 For the present invention Figure 13 A schematic diagram of the cross-sectional structure; Figure 15 For the present invention Figure 5 A schematic diagram of the cross-sectional structure; Figure 16 For the present invention Figure 2 A cross-sectional structural diagram.

[0016] In the diagram: 1. Dredging vehicle body; 2. Walking wheels; 3. Filter collection basket; 4. Water inlet hose; 5. Fixing base; 6. Protective cover; 7. Protective shell; 8. Drive gear ring; 9. Protective cylinder seat; 10. Second annular end cap; 11. First annular end cap; 12. Front cutter head; 13. Hollow rotary drum; 14. Gathering and conveying assembly; 141. Outer pulley; 142. Conveyor belt; 143. Scraper; 144. Inner pulley; 15. Filter tank; 16. Central fixing pipe; 17. Fixed internal threaded disc; 18. Annular cylinder seat; 19. Planetary gear. ; 20. Fixed external gear ring; 21. Rear inner groove; 22. First spiral bevel gear; 23. Second spiral bevel gear; 24. Rotating shaft; 25. Scraper; 26. Front inner groove; 27. Middle reserved hole; 28. Second servo motor; 29. ​​Second pulley; 30. Belt; 31. First servo motor; 32. Connecting block; 33. Mounting ring; 34. Spiral blade; 35. Water spray hole; 36. First pulley; 37. Leakage groove; 38. Bearing; 39. Middle channel; 40. Limiting cylinder; 41. Drive gear; 42. Insert pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example: Please see Figures 1-16 The present invention provides a technical solution: A sludge removal device for culverts in highway reconstruction and expansion projects includes a sludge removal vehicle body 1 with wheels 2 at its bottom. The sludge removal vehicle body 1 serves as the main load-bearing structure of the entire device. The wheels 2 allow the device to move freely within the culverts and flexibly reach the locations requiring sludge removal. This mobility significantly improves the efficiency of sludge removal work. Compared to traditional fixed sludge removal equipment, it eliminates the need for cumbersome transportation and reinstallation, saving considerable time and labor costs.

[0019] The front end of the dredging vehicle body 1 is equipped with a dredging disc assembly, and the middle part of the dredging vehicle body 1 is rotatably equipped with a middle high-pressure water jet auger assembly, the front end of which extends through the middle of the dredging disc assembly. The sludge removal plate assembly includes a central fixed pipe 16, a front cutter disc 12 sleeved on the outer side of the front of the central fixed pipe 16, a gathering and conveying assembly 14 evenly spaced at the front of the front cutter disc 12, a driving assembly at the rear of the front cutter disc 12, and a fixed external toothed ring 20 installed on the outer side of the front of the central fixed pipe 16. The front surface of the front cutter head 12 is also provided with a scraper 25; The front-end cutter head 12 is driven to rotate by the first servo motor 31 at the upper front of the dredging vehicle body 1 to stir the sludge. At the same time, the front-end cutter head 12 drives the gathering and conveying component 14 through the fixed outer toothed ring 20 and the drive component, so that the gathering and conveying component 14 gathers the impurities in the sludge in the center. The front cutter head 12 is provided with a middle reserved hole 27 for the insertion of the front end of the middle fixing tube 16. The front end of the front cutter head 12 is provided with a number of front inner grooves 26 at equal intervals, and the rear end of the front cutter head 12 is provided with a number of rear inner grooves 21 at equal intervals. The gathering and conveying assembly 14 includes an inner pulley 144 fixed to the inner side of the front inner groove 26 by an inner shaft, an outer pulley 141 fixed to the outer side of the front inner groove 26 by an outer shaft, a conveyor belt 142 connecting the inner pulley 144 and the outer pulley 141, and scrapers 143 evenly spaced on the outer side of the conveyor belt 142. The drive assembly includes a first spiral bevel gear 22 with one end of its inner shaft extending into the corresponding rear inner groove 21 and fixed thereafter, a second spiral bevel gear 23 meshing with the first spiral bevel gear 22, and a planetary gear 19 fixed in the middle of the second spiral bevel gear 23 by a rotating shaft 24. The planetary gear 19 meshes with the outer side of the fixed external gear ring 20.

[0020] The rear end of the front cutter head 12 is fixed with a first annular end cap 11. The first annular end cap 11 is sleeved on the outer side of the front end of the middle fixing tube 16, sealing the first spiral bevel gear 22 and the second spiral bevel gear 23 in the corresponding rear inner groove 21. This structure effectively prevents sludge and sewage from entering the drive assembly during the dredging process, avoiding problems such as corrosion and jamming caused by contamination. As a key component of the dredging disc assembly that enables power transmission and impurity collection, the normal operation of the drive assembly is crucial. The sealing effect of the first annular end cap 11 creates a favorable environment for the stable operation of the drive assembly.

[0021] The front cutter head 12 is provided with a lubricating oil nozzle that communicates with the rear inner groove 21. Lubricating oil is injected into the rear inner groove 21 through the lubricating oil nozzle to lubricate the first spiral bevel gear 22 and the second spiral bevel gear 23.

[0022] The front end of the first annular end cap 11 is fixed with several sets of limiting cylinders 40 at equal intervals, and the rear end of the first annular end cap 11 is also provided with an annular cylinder seat 18. The rotating shaft 24 extends into the annular cylinder seat 18 through the corresponding limiting cylinder 40 and is then fixedly connected to the planetary gear 19.

[0023] A second annular end cap 10 is fixed to the rear end of the annular cylindrical seat 18. The second annular end cap 10 is sleeved on the outer rear part of the middle fixing tube 16, sealing the fixed external gear ring 20 and planetary gear 19 inside the annular cylindrical seat 18. This also prevents external contaminants from entering, ensuring normal meshing and transmission between the fixed external gear ring 20 and the planetary gear 19. During dredging operations, if impurities enter this area, it may cause the gap between the gears to become smaller, increasing friction and even causing the planetary gear 19 to jam. The presence of the second annular end cap 10 effectively avoids these problems.

[0024] The annular cylinder seat 18 is also equipped with a lubricating nozzle, through which lubricating oil is injected into the annular cylinder seat 18 to lubricate the fixed external gear ring 20 and the planetary gear 19.

[0025] The rear end of the second annular end cap 10 is fixed with a protective cylinder seat 9, and a drive toothed ring 8 is provided on the outer side of the rear end of the protective cylinder seat 9. The upper front part of the dredging vehicle body 1 is provided with a protective shell 7 for protecting the first servo motor 31. The output end of the first servo motor 31 is connected to a drive gear 41, which meshes with the top outer side of the drive gear ring 8. The protective cylinder base 9 is also provided with a fixed internal threaded disc 17 that is screwed to the outer side of the rear part of the middle fixed tube 16; The front outer side of the intermediate channel 39 is fixed with a number of equally spaced connecting blocks 32, and the mounting rings 33 are fixed to the rear end of the fixed internal threaded disc 17. This installation can fix the middle fixed tube 16.

[0026] The rear end of the central fixing tube 16 is inserted into the front side of the interior of the central channel 39, and the front end of the hollow rotating cylinder 13 extends through the central fixing tube 16.

[0027] After the dredging operation is started, the first servo motor 31 located at the upper front of the dredging vehicle body 1 begins to operate (protected by a protective shell 7 to prevent sludge from contaminating the motor). The drive gear 41 connected to the output end of the first servo motor 31 meshes with the drive gear ring 8 on the outer rear end of the protective cylinder seat 9, transmitting power to the protective cylinder seat 9 through gear transmission. Since the protective cylinder seat 9 and the front cutter head 12 are fixedly connected by structures such as the annular cylinder seat 18 and the second annular end cover 10, the power ultimately drives the front cutter head 12 to rotate around the central fixed tube 16.

[0028] The scraper 25 on the front surface of the front cutter disc 12 rotates synchronously with the cutter disc and comes into direct contact with the silt in the circular pipe culvert. Through mechanical cutting and stirring, it breaks up the clumps and viscous silt, making it loose. At the same time, when the outer diameter of the front cutter disc 12 is slightly smaller than the inner diameter of the circular pipe culvert, it can also scrape off the stubborn silt layer attached to the inner wall of the circular pipe culvert, creating favorable conditions for subsequent impurity separation and transportation.

[0029] While the front cutter head 12 rotates, its internal drive component and the gathering and conveying component 14 work together to centrally gather impurities in the sludge. The specific transmission path is as follows: Power is transmitted from the front cutter head 12 to the drive assembly: When the front cutter head 12 rotates, it will drive the first spiral bevel gear 22 in the rear inner groove 21 to make a circular motion around the central fixed tube 16. The planetary gear 19, because it meshes with the fixed outer gear ring 20 (the fixed outer gear ring 20 is fixed), will rotate during the circular motion, and transmit the rotational power to the second spiral bevel gear 23 through the rotating shaft 24.

[0030] Power is transmitted from the drive assembly to the conveying assembly: After the second spiral bevel gear 23 rotates, it drives the first spiral bevel gear 22 and the inner shaft to rotate through meshing with the first spiral bevel gear 22, thereby causing the inner pulley 144 in the front inner groove 26 to rotate. The inner pulley 144 and the outer pulley 141 are connected by the conveyor belt 142. The rotation of the inner pulley 144 drives the conveyor belt 142 to circulate around the inner pulley 144 and the outer pulley 141.

[0031] The process of centrally gathering impurities: The scrapers 143, which are equally spaced on the outer side of the conveyor belt 142, move synchronously with the conveyor belt. Since multiple sets of gathering conveyor components 14 are equally spaced at the front end of the front cutter head 12, and the movement direction of each set of conveyor belts 142 is towards the center of the front cutter head 12, the scrapers 143 will push the branches, stones, plastics and other impurities in the dispersed sludge towards the center of the cutter head, and finally achieve the central gathering of impurities, so as to accurately locate the position of impurities for the subsequent conveying operation of the central high-pressure water jet auger component.

[0032] When the conveyor belt 142 rotates, it can also loosen the sludge. Combined with the rotation of the front cutter head 12, it can prevent the sludge from clogging.

[0033] The central high-pressure water jet auger assembly includes a hollow rotating cylinder 13 installed in the middle channel 39 in the middle of the dredging vehicle body 1, a spiral blade 34 installed on the front outer wall of the hollow rotating cylinder 13, and a water inlet assembly connected to the rear end of the hollow rotating cylinder 13. The hollow rotating drum 13 is driven to rotate by the second servo motor 28 at the upper rear of the dredging vehicle body 1, which transports the collected sludge and impurities backward.

[0034] The upper rear part of the dredging vehicle body 1 is provided with a protective cover 6 covering the outside of the second servo motor 28. The outer rear end of the hollow rotating drum 13 is fixed with a first pulley 36, which is connected to the second pulley 29 at the output end of the second servo motor 28 via a belt 30.

[0035] After the second servo motor 28 (protected by a protective cover 6 on the outside to isolate external pollution) at the upper rear of the dredging vehicle body 1 is started, the second pulley 29 at its output end is connected to the first pulley 36 on the outer rear end of the hollow rotating drum 13 via the belt 30, and the power is transmitted to the hollow rotating drum 13 through the belt drive.

[0036] Several sets of bearings 38 are embedded in the rear of the intermediate channel 39, and the bearings 38 are sleeved on the outer rear of the hollow rotating cylinder 13. This ensures the stable rotation of the hollow rotating cylinder 13 and reduces the frictional resistance during rotation.

[0037] The front end of the hollow rotating drum 13 extends through the central fixed tube 16, precisely aligning with the area of ​​impurities gathered by the sludge removal plate assembly. The spiral blades 34 on the outer front wall of the hollow rotating drum 13 rotate synchronously with the drum. Through the spiral angle of the spiral blades 34, the sludge and impurities gathered at the front center are transported backward, causing the impurities to gradually move towards the rear of the sludge removal vehicle body 1 along the central channel 39, thus achieving directional transport of the impurities.

[0038] The front end of the hollow rotating cylinder 13 is provided with a conical sealing head, and the surface of the conical sealing head is provided with a number of water spray holes 35. The water inlet assembly includes a fixed base 5 fixed at the rear end of the intermediate channel 39, a plug tube 42 disposed at the middle of the front end of the fixed base 5, and a water inlet hose 4 connected at the middle of the rear end of the fixed base 5. The insertion tube 42 is inserted into the middle of the rear end of the hollow rotating cylinder 13.

[0039] During the impurity transport process, the water inlet assembly simultaneously provides high-pressure water flow to assist in sludge removal: the water inlet hose 4 introduces an external high-pressure water source into the connector 42, which is inserted into the middle of the rear end of the hollow rotating cylinder 13, allowing high-pressure water to enter the hollow cavity inside the hollow rotating cylinder 13. Since the front end of the hollow rotating cylinder 13 is equipped with a conical sealing head, and the surface of the sealing head has several sets of spray holes 35, the high-pressure water will be sprayed outwards through the spray holes 35.

[0040] A filter collection basket 3 is inserted into the receiving slot at the rear of the dredging vehicle body 1. The bottom of the filter collection basket 3 is provided with a filter slot 15. A leakage slot 37 is provided in the middle of the middle channel 39. The leakage slot 37 is connected to the top of the front end of the receiving slot.

[0041] The filter collection basket 3 plays a crucial role in collecting silt and impurities (twigs, stones, etc.) within the entire dredging device. Its working principle is based on a clever integration with the central channel 39. The filter collection basket 3 has a filter groove 15 at its bottom, and a trough 37 is located in the middle of the central channel 39. The trough 37 connects to the top front of the receiving tank. When the silt and impurities are transported by the high-pressure water jet auger assembly in the middle, they move backward through the central channel 39 and reach the trough 37. Due to gravity, the silt and impurities fall from the trough 37 into the filter collection basket 3 below. The presence of the filter groove 15 allows water to flow out during the collection process, while the silt and impurities are trapped inside the filter collection basket 3, achieving initial solid-liquid separation.

[0042] This design not only improves the efficiency of collecting silt and impurities, but also makes the collected silt and impurities easier to process later.

[0043] Specifically, when using it: The sludge-mixing disc assembly, as the vanguard of the sludge-mixing operation, plays a crucial role throughout the entire process. Its function of mixing sludge is mainly accomplished by the first servo motor 31 and the front-end cutter head 12 working together.

[0044] The first servo motor 31 is installed at the upper front of the dredging vehicle body 1. The first servo motor 31 is controlled by the PLC built into the dredging vehicle body 1, which can precisely control the output torque and speed of the first servo motor 31. When the first servo motor 31 is started, it drives the front cutter head 12 to rotate.

[0045] During rotation, the front-end cutter disc 12 acts like a powerful mixer, agitating the silt within the culvert. Its unique structural design enhances the agitation effect; the disc surface is equipped with scrapers 25, allowing the cutter disc 12 to more effectively break up the silt during rotation. Under the agitation of the front-end cutter disc 12, the originally tightly packed structure of the silt is disrupted, becoming loose and laying a good foundation for subsequent cleaning work. Compared to traditional dredging methods, this agitation method can penetrate deeper into the silt, thoroughly agitating even the deeper layers and greatly improving the thoroughness of dredging.

[0046] In addition to agitating the sludge, the sludge-cleaning disc assembly also plays a crucial role in centrally gathering impurities within the sludge. This function relies on the ingenious coordination between the front-end cutter head 12, the fixed external gear ring 20, the drive assembly, and the gathering and conveying assembly 14.

[0047] While rotating and stirring the sludge, the front cutter head 12 transmits power to the drive assembly through the fixed external gear ring 20. The fixed external gear ring 20 is tightly fitted and fixed to the outer front part of the middle fixed tube 16. The planetary gear 19 in the drive assembly meshes with the outer side of the fixed external gear ring 20. When the front cutter head 12 rotates, the planetary gear 19 rotates around its own axis (rotating shaft 24) under its drive, and at the same time revolves around the central axis of the fixed external gear ring 20.

[0048] The combined motion of the planetary gear 19 is transmitted to the second spiral bevel gear 23 via the rotating shaft 24. The second spiral bevel gear 23 meshes with the first spiral bevel gear 22, thereby driving the first spiral bevel gear 22 to rotate. The first spiral bevel gear 22 is fixed to one end of the inner shaft, which in turn drives the inner pulley 144 to rotate.

[0049] A conveyor belt 142 is connected between the inner pulley 144 and the outer pulley 141 of the gathering and conveying assembly 14. When the inner pulley 144 rotates, the conveyor belt 142 moves accordingly, and the scrapers 143, which are evenly spaced on the outer side of the conveyor belt 142, also move together. During the movement, the scrapers 143 continuously gather impurities in the sludge towards the center.

[0050] This unique design concentrates impurities in a smaller area, facilitating subsequent cleaning and transportation by the central high-pressure water jet auger assembly. By concentrating the impurities, it prevents them from scattering during the dredging process, improving efficiency and targeting, reducing missed areas, and resulting in a more ideal dredging effect.

[0051] The central high-pressure water jet auger assembly plays a key role in transporting dredged products in the entire dredging device. Its function of transporting silt and impurities is mainly achieved by the second servo motor 28, the hollow rotating drum 13, and the spiral blades 34.

[0052] The second servo motor 28 is installed at the upper rear of the dredging vehicle body 1, and it is the power source for the rotation of the hollow rotating drum 13. The second servo motor 28 is controlled by a PLC built into the dredging vehicle body 1. The second servo motor 28 has high-precision speed control capability and can accurately adjust the rotation speed of the hollow rotating drum 13 according to the actual needs of the dredging work. When the second servo motor 28 starts, the second pulley 29 at its output end begins to rotate, which drives the first pulley 36 to rotate through the belt 30, thereby causing the hollow rotating drum 13 to rotate at high speed around its own axis.

[0053] The spiral blades 34 mounted on the front outer wall of the hollow rotating drum 13 are the core component for transporting sludge and impurities. As the hollow rotating drum 13 rotates, the spiral blades 34 rotate accordingly, acting like a propeller. The sludge and impurities gathered in the center by the sludge removal disc assembly are propelled backward along the axial direction of the hollow rotating drum 13 by the spiral blades 34. The pitch and blade shape of the spiral blades 34 are carefully designed to provide sufficient thrust, ensuring stable and efficient backward transport of the sludge and impurities.

[0054] Compared to traditional direct suction methods, this transportation method offers greater adaptability and reliability. It effectively avoids clogging problems caused by the stickiness and uneven particle size of silt and impurities, ensuring the continuity and efficiency of dredging operations. Furthermore, by controlling the rotational speed of the second servo motor 28, the transportation speed of the silt and impurities can be flexibly adjusted to adapt to different dredging conditions.

[0055] The high-pressure water jetting function of the central high-pressure water jetting auger assembly provides powerful assistance for dredging operations, further improving the effectiveness and quality of the dredging. This function relies on the water inlet assembly, the hollow rotating drum 13, and the conical sealing head.

[0056] The water inlet assembly includes a mounting base 5 fixed to the rear end of the intermediate channel 39, a connector 42 disposed at the center of the front end of the mounting base 5, and a water inlet hose 4 connected to the center of the rear end of the mounting base 5. The rear end of the water inlet hose 4 is connected to an external water source via a high-pressure water pump, which is controlled by a PLC built into the dredging vehicle body 1 to introduce water into the connector 42. The connector 42 is inserted into the center of the rear end of the hollow rotating drum 13, allowing water to smoothly enter the interior of the hollow rotating drum 13.

[0057] The hollow rotating cylinder 13 has a conical sealing head at its front end, and the surface of the conical sealing head has several sets of water spray holes 35. When water enters the hollow rotating cylinder 13, it is sprayed out in the form of high-pressure water jets through the water spray holes 35 under pressure. These high-pressure water jets have a strong impact force and can flush out the silt in the circular culvert. Since the front end of the hollow rotating drum 13 is at the very front of the entire device, the high-pressure water jet sprayed from the front end of the hollow rotating drum 13 first impacts the sludge, wetting and diluting it, reducing its viscosity, and initially loosening it to facilitate the subsequent rotation and stirring of the sludge by the front-end cutter disc 12. Subsequently, the high-pressure water jet further peels off the sludge and impurities adhering to the wall of the circular culvert, making the dredging more thorough.

[0058] Meanwhile, wetting and diluting the sludge can reduce its adhesion to the spiral blades 34 and the inner wall of the hollow rotating cylinder 13, prevent blockage, and ensure that the sludge impurities can be transported smoothly backward.

[0059] This design, which combines high-pressure water spraying with spiral conveying, allows the central high-pressure water spraying auger assembly to perform a dual function during the dredging process, greatly improving the overall performance and dredging efficiency of the dredging device.

[0060] Most of the silt, after being diluted by high-pressure water flow, flows out through the culvert.

[0061] The surface of the hollow rotating cylinder 13 is also provided with water spray holes 35. The water sprayed through the water spray holes 35 on the surface of the hollow rotating cylinder 13 can dilute the sludge entering the intermediate channel 39, so that after the sludge enters the filter collection basket 3, the sludge can flow out through the filter tank 15.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highway reconstruction and expansion round pipe culvert silt cleaning device, comprising a dredging vehicle body (1), characterized in that: The front end of the dredging vehicle body (1) is provided with a dredging disc assembly, the middle part of the dredging vehicle body (1) is rotatably provided with a middle high-pressure water jet auger assembly, and the front end of the middle high-pressure water jet auger assembly extends out through the middle part of the dredging disc assembly. The dredging disc assembly comprises a middle fixed pipe (16), a front-end cutter head (12) sleeved on the outer side of the front part of the middle fixed pipe (16), a gathering and conveying assembly (14) arranged at equal intervals at the front end of the front-end cutter head (12), a driving assembly arranged at the rear part of the front-end cutter head (12), and a fixed outer gear ring (20) installed on the outer side of the front part of the middle fixed pipe (16). The front-end cutter head (12) is driven to rotate by a first servo motor (31) at the upper end of the front part of the dredging vehicle body (1), so as to realize stirring of the sludge, and meanwhile, the front-end cutter head (12) drives the gathering and conveying assembly (14) through the fixed outer gear ring (20) and the driving assembly, so that the gathering and conveying assembly (14) gathers the impurities in the sludge. The middle high-pressure water jet auger assembly comprises a hollow rotating cylinder (13) arranged in the middle channel (39) of the middle part of the dredging vehicle body (1), spiral blades (34) arranged on the outer wall of the front part of the hollow rotating cylinder (13), and a water inlet assembly connected to the rear end of the hollow rotating cylinder (13). The hollow rotating cylinder (13) is driven to rotate by a second servo motor (28) at the upper end of the rear part of the dredging vehicle body (1), so as to transport the gathered sludge impurities backward.

2. The device according to claim 1, characterized in that: The rear upper end of the dredging vehicle body (1) is provided with a protective cover (6) covering the outer side of the second servo motor (28). The rear end of the hollow rotating cylinder (13) is fixed with a first belt pulley (36), and the first belt pulley (36) is connected to a second belt pulley (29) at the output end of the second servo motor (28) through a belt (30).

3. The device according to claim 1, characterized in that: The rear part of the middle channel (39) is embedded with a plurality of bearings (38) sleeved on the outer side of the rear part of the hollow rotating cylinder (13).

4. The device according to claim 1, characterized in that: The front end of the hollow rotating cylinder (13) is provided with a conical sealing head, and the surface of the conical sealing head is provided with a plurality of water injection holes (35). The water inlet assembly comprises a fixed seat (5) fixed to the rear end of the middle channel (39), an insertion pipe (42) arranged at the middle part of the front end of the fixed seat (5), and a water inlet hose (4) connected to the middle part of the rear end of the fixed seat (5). The insertion pipe (42) is inserted into the middle part of the rear end of the hollow rotating cylinder (13).

5. The device for cleaning silt in a round pipe culvert of a highway reconstruction and extension project according to claim 1, characterized in that: The rear part of the dredging vehicle body (1) is provided with a filter collection basket (3) inserted into a containing groove, the bottom of the filter collection basket (3) is provided with a filter groove (15), the middle part of the middle channel (39) is provided with a leakage groove (37) in communication with the top of the front end of the containing groove.

6. The device for cleaning silt in a round pipe culvert of a highway reconstruction and extension project according to claim 1, characterized in that: The middle part of the front-end cutter head (12) is provided with a middle reserved hole (27) for insertion of the front end of the middle fixed pipe (16), and the front end of the front-end cutter head (12) is provided with a plurality of front inner grooves (26) arranged at equal intervals, and the rear end of the front-end cutter head (12) is provided with a plurality of rear inner grooves (21) arranged at equal intervals. The gathering and conveying assembly (14) comprises an inner side pulley (144) fixed by an inner side shaft inside the front inner groove (26), an outer side pulley (141) fixed by an outer side shaft outside the front inner groove (26), a conveying belt (142) connected between the inner side pulley (144) and the outer side pulley (141), and scrapers (143) equidistantly arranged outside the conveying belt (142); The driving assembly comprises a first spiral bevel gear (22) fixed at one end of the inner side shaft and extending into the corresponding rear inner groove (21), a second spiral bevel gear (23) engaged with the first spiral bevel gear (22), and a planetary gear (19) fixed by a rotating shaft (24) at the middle part of the second spiral bevel gear (23); The planetary gear (19) is engaged outside the fixed outer gear ring (20).

7. The device for cleaning silt in a round pipe culvert of a highway reconstruction and extension project according to claim 6, characterized in that: The first annular end cover (11) is fixed at the rear end of the front end cutter head (12), is sleeved outside the front end of the middle fixed pipe (16), and seals the first spiral bevel gear (22) and the second spiral bevel gear (23) in the corresponding rear inner groove (21); A plurality of sets of limiting cylinders (40) are equidistantly fixed at the front end of the first annular end cover (11), and the rear end of the first annular end cover (11) is further provided with an annular cylinder seat (18), the rotating shaft (24) extends into the annular cylinder seat (18) through the corresponding limiting cylinder (40) and is fixedly connected with the planetary gear (19).

8. The device for cleaning silt in a round pipe culvert of a highway reconstruction and extension project according to claim 7, characterized in that: The second annular end cover (10) is fixed at the rear end of the annular cylinder seat (18), is sleeved outside the rear part of the middle fixed pipe (16), and seals the fixed outer gear ring (20) and the planetary gear (19) in the annular cylinder seat (18).

9. The device for cleaning silt in a round pipe culvert of a highway reconstruction and extension project according to claim 8, characterized in that: The rear end of the second annular end cover (10) is fixed with a protection cylinder seat (9), and the rear end outside of the protection cylinder seat (9) is provided with a driving gear ring (8); The front part of the dredging vehicle body (1) is provided with a protection shell (7) for protecting the first servo motor (31), and the output end of the first servo motor (31) is connected with a driving gear (41) engaged outside the top of the driving gear ring (8); The protection cylinder seat (9) is further provided with a fixed internal thread disc (17) screwed and fixed outside the rear part of the middle fixed pipe (16); The front end outside of the middle channel (39) is fixed with a mounting ring (33) by a plurality of sets of equidistantly distributed connecting blocks (32), and the mounting ring (33) is fixed at the rear end of the fixed internal thread disc (17).

10. The device for cleaning silt in a round pipe culvert for reconstruction and extension of an expressway according to claim 1, characterized in that: The rear end of the middle fixed pipe (16) is inserted into the inside front side of the middle channel (39), and the hollow rotating cylinder (13) extends out through the middle fixed pipe (16) at the front end.

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